Is it a pronoun or adjective?

[Solomon_13000]

I say its a pronoun for the word "her" while others says the better term is "adjective". which is true for the bellow?:

All her clothes are neatly ironed.

[Conchita]

In your sentence, 'her' has the sense of 'belonging to her' and is a possessive adjective or determiner.

[Ahmadov]

Most people who are fluent in English would not be able to answer this question... So, I would recommend to focus on other important things than going into details of grammar if you do not need them for academic purposes...
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Learning is a sacred engagement.

[Mister Micawber]

.
All the fluent speakers here can answer your question, Solomon.

Her is a pronomial in form (the possessive form of she), but it is a possessive adjective (a kind of determiner) in function in your sentence. It is also an object pronoun, the objective form of she:

All her clothes are ironed. (possessive adjective)
I'll see her tonight. (object pronoun)
.
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Native English teacher at Mister Micawber's

[Ahmadov]

[Ahmadov]

Ooops, sorry Mister Micawber,

I have just noticed that you meant people here, not in general...
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Learning is a sacred engagement.